respiratory system

    Cards (13)

    • Aerobic Respiration

      Aerobic repitation exercise can be maintained for long periods of time, includes activities like walking, jogging, cycling & swimming, the intensity of exercise is moderate & duration long
    • Aerobic Respiration
      1. glucose
      2. oxygen
      3. energy
      4. Carbon dioxide
      5. water
    • Aerobic Respiration

      • marathon runner
      • long-distance swimming
    • Anaerobic Respiration

      when you exercise at a high intensity, the respiratory system cannot Supply enough oxygen to the muscles, with no oxygen available, glucose is still used but produces energy & lactic acid (this causes fatigue), it includes activities like sprinting, weightlifting, jumping, the intensity of exercise is high & duration short
    • Anaerobic Respiration
      1. glucose
      2. energy
      3. lactic acid
    • Anaerobic Respiration

      • 100m sprint
    • Inspiration
      1. External muscles contract
      2. Internal intercostal muscles relax
      3. Ribs move upwards & outwards
      4. Chest expands
      5. Diaphragm contracts & flattens
      6. Lungs increase in size
      7. Pressure inside lungs falls
      8. Air sucked in through nose & mouth
    • Expiration
      1. External intercostal muscles relax
      2. Internal intercostal muscles contract
      3. Ribs move downwards & inwards
      4. Chest gets smaller
      5. Diaphragm relaxes & domes
      6. Lungs decrease in size
      7. Pressure inside lungs increases
      8. Air forced out through nose & mouth
    • Pathway of air
      • Air enters mouth/nose
      • Travels down pharynx, epiglottis, larynx
      • Continues down trachea to bronchi then bronchioli
      • Finally reaches alveoli where gaseous exchange occurs
    • Gaseous exchange
      1. Air enters alveoli high in O₂ and low in CO₂
      2. Alveoli have good blood supply from capillaries
      3. O₂ diffuses into bloodstream, CO₂ diffuses out
      4. Capillaries are one cell thick for easy diffusion
      5. Slow down red blood cells
    • Tidal volume
      The volume of air that is inspired or expired per breath
    • Breathing rate
      The number of breaths per minute
    • Minute ventilation
      The volume of air that is inspired or expired in 1 minute
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